Irrigation of Grassland

Low, A. J.; Armitage, Eleonora

doi:10.1177/003072705900200503

Cited by 11 publications

(15 citation statements)

References 6 publications

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“…Overwatering may depress yields (12,15), but this is unlikely on a free-draining soil (16). Apart from any possible loss in yield or waste arising from overwatering, practical considerations, to keep labour and equipment costs to a minimum, would require that swards should be irrigated as infrequently as possible, consistent with a worthwhile improvement in yield.…”

Section: Grassland Research Institute Hurley Berkshirementioning

confidence: 99%

“…This suggests that economy in both the amounts of water used and in the frequency of irrigation may be achieved by applying water only in sufficient quantities to enable the roots in the upper horizon of soil to absorb the nutrients while making further use of water from a greater depth. The work reported here investigated the efficiency of use of irrigation water, particularly when used in quantities less than that indicated by the soil water deficit INTRODUCTION Previous reports on the irrigation of grass or grass/clover swards have shown that the more frequently a sward is irrigated and the nearer to field capacity the soil is maintained the greater is the yield response to irrigation (12,13,16).…”

Section: Grassland Research Institute Hurley Berkshirementioning

confidence: 99%

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The Response of S24 Perennial Ryegrass Swards to Irrigation

Garwood¹,

Tyson²

1973

Grass and Forage Science

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Section: Grassland Research Institute Hurley Berkshirementioning

confidence: 99%

Section: Grassland Research Institute Hurley Berkshirementioning

confidence: 99%

The Response of S24 Perennial Ryegrass Swards to Irrigation

Garwood¹,

Tyson²

1973

Grass and Forage Science

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“…Under dry conditions, irrigation improves the uptake and utilization of N. Usually it fails to improve response to N of mixed swards because it also enhances the contribution from clover in the control plots (4,9,14). It is perhaps not surprising that, where shortage of nitrogen limits production, white clover, which can fix nitrogen, will make a greatly increased contribution when an inadequate moisture supply is corrected.…”

Section: Some Practical Considerationsmentioning

confidence: 99%

The Effect of White Clover and Nitrogenous Fertilizer on the Production of a Sward

Cowling

1961

Grass and Forage Science

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Three-year leys of cocksfoot/white clover and cocksfoot alone were dressed with 0, 35, iO5 and 210 lb. N per acre every year to provide information on the efFect of clover and N on annual production.White clover contributed 40"^, of the dry-matter yield but its presence was respotisible for IT/o of this yield where no N was used: it was responsible for less than 8%, and contributed 5%, where 210 lb. N per acre was applied annually, lt was estimated that grass alone receiving 160 lb. N per acre would yield as much dry niaiter as a mixed sward receiving none.Clover had the indirect effect of raising yield of nitrogen in the companion grass by 60 Ib. per acre per year. A maximum of lOfi Ib. was recorded in 1958.The response of the tnixed sward averaged iO Ib. of dry matter per lb. N. Prevailing economic circumstances will determine if this level is satisfactory in practice.The recovery of N by grass alone varied from 54% at ibc lowest level of N to 80°;, at the highest. On mixed swards apparent recovery was negative or low: N was to a large extent only replacing the effect of clover which was suppressed by its use.Factors influencing response and the difference between that obtained under experimental and practical conditions are discussed.The use of N to produce out-of-season grass may give good response, but may cause a reduction in clover contribution.

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“…Some authors (Bartels 1966;Low & Armitage 1959;Stiles 1966) have found that the clover content in mixed swards can be increased by irrigation, yet Reid & Castle (1965) found that irrigation had no significant effect on the proportion of clover, and Kleter (1968) could discover no correlation between percentage of clover in mixed swards and summer rainfall. Some authors (Bartels 1966;Low & Armitage 1959;Stiles 1966) have found that the clover content in mixed swards can be increased by irrigation, yet Reid & Castle (1965) found that irrigation had no significant effect on the proportion of clover, and Kleter (1968) could discover no correlation between percentage of clover in mixed swards and summer rainfall.…”

Section: Introductionmentioning

confidence: 99%

Effects of Drought on Growth and Competitive Ability of Perennial Ryegrass and White Clover

Thomas¹

1984

The Journal of Applied Ecology

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. This content downloaded from 128. SUMMARY(1) Lolium perenne cv. S.23 (a late flowering perennial ryegrass), Trifolium repens cv. S. 184 (a small-leaved, wild-type white clover) and T. repens cv. Olwen (a large-leaved white clover) were grown in containers in the glasshouse as monocultures and as mixtures of grass and clover.(2) Droughting 28-56 days after sowing reduced the shoot growth of grass and clover monocultures equally, but affected covers more than ryegrass in mixtures, possibly because the clover had much smaller systems than the grass.(3) Droughting 4-5 months after sowing reduced cut-herbage weights (but not total shoot weights) of the covers more than those of the grass. The small-leaved clover became so small that it almost completely avoided defoliation at the end of drought; the remaining stubble weights were much greater than in control plants.(4) Herbage regrowth of the large-leaved clover was unaffected by previous drought and that of the ryegrass was slightly increased. Regrowth of previously droughted small-leaved clover from the heavy, densely-rooted stubble was twice that of the controls. In previously droughted mixtures, clover regrowth was less suppressed by grass than in continuously watered mixtures.(5) It is concluded that, during drought in the field, the clover content of mixed swards might be maintained by frequent defoliation. The competitive ability of clover during drought might be improved by breeding for greater root density and for the ability to adopt a low, defoliation-avoiding habit during dry weather.

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Irrigation of Grassland

Cited by 11 publications

References 6 publications

The Response of S24 Perennial Ryegrass Swards to Irrigation

The Response of S24 Perennial Ryegrass Swards to Irrigation

The Effect of White Clover and Nitrogenous Fertilizer on the Production of a Sward

Effects of Drought on Growth and Competitive Ability of Perennial Ryegrass and White Clover

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